Exam (elaborations)
Parts of an Atom Questions and Answers
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Exam of 4 pages for the course Atom at Atom (Parts of an Atom)
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Parts of an Atomfire, water, air, earth - answer Many Ancient Greek philosophers thought that all matter
was made of these four elements.
test - answer Early scientists were not able to __ their theories.
atoms - answer Democritus proposed that matter is made of small, invisible objects.
matter - answer Democritus proposed that different types of ___ are made from different
types of atoms.
atomic, measurements - answer John Dalton proposed the ___ theory, which was
based on careful observations and ____ of chemical reactions.
divided, created, destroyed - answer Dalton’s atomic theory states that atoms cannot be
____, _____, or ____.
element, element - answerDalton's atomic theory stated that atoms of one ___ are
different that atoms of another ____.
atom - answersmallest piece of an element that still represents that element.
STM - answerAtoms were first seen using a(n) ____ microscope.
cathode ray tube, positive, negative - answerThomson discovered that rays in a(n)
_____ were attached to a(n) ____ charged plate, which means that the rays that a(n)
____ charge.
sphere, electrons - answerThomson's atomic model stated that an atom is a positively
charged ____ with _____ through it.
alpha, gold - answerRutherford's student preformed an experiment during which they
shot ___ particles into a piece of ___ foil.
side, backwards - answerThe results in Rutherford's students experiment showed that
most of the particles traveled through the foil, but some bounced to the ___, and few
bounced straight ____.
mass, positive - answerRutherford's resulting atomic model proposed that most of an
atom's ___ and ____ charge is concentrated in the center of an atom.
James Chadwick - answerOne of Rutherford's colleagues who discovered the neutron.
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